Valve-operating mechanism.



A. 8088. VALVE OPERATING WECHANISM. APPLICATION FILED JULY 5, 1916.

Paten' ted Mar. 6, 1917.

gluon 1 for tion of the push ARTHUR $088, 0]! SEWARD, NEBRASKA.

VALVE-OPERATING MECHANISM.

Specification of Letters Patent.

Patented Mar. 6, 1917'.

Application filed July 5, 1916. Serial No. 107,699.

To all whom it may concern:

Be it known that I, ARTHUR Soss, a citizen of the United States, residing at Seward, in the county of Seward and State of Nebraska, have invented new and useful Improvements in Valve-Operating Mechanism, of which the following is a specification.

This invention relates to valve operating mechanisms for gas engines and has as one of its objects to provide an actuating mechanism so constructed as to insure of proper seating of the valve during the working stroke of the piston. In the ordinary mechnisms of this class, the push rod which coacts with the valve stem is liable to expand to such an extent, 'through the heat from the engine, as to prevent the valve seating snugly upon its seat, or if it is adjusted so as to insure of proper seating of the valve regardless of expansion of the parts, noise will likely be created through knocking of the actuating cam against the push rod or through knocking of the push rod against the lower end of the valve stem. The present invention therefore aims to provide a push rod so constructed that the, upper end thereof will at all times engage against the lower end of the valve stem and the lower end against the actuating cam, and yet provide for expansion and contracrod and valve stem. In this manner proper seating of the valve is insured and at the same time, the operation of the valve is noiseless as there is no actual separation of the parts as the valve becomes seated.

In the accompanying drawings:

Figure 1 is "a vertical sectional view through the device embodying the present invention applied, the valve being shown open, and

' Fig. 2 is a similar view, shown closed.

In the drawings, the numeral 5 indicates in general the cylinder of a gas engine and (S a valve casing associated therewith. The valve casing is provided with a seat 7 for the valve which is indicated by the numeral the valve being and which has a stem 9 working'in a suitable bushing 10 fitted through the lower end of the valve casing. A spring 11 bears at its upper end against the lower end of the valve casing and at its lower end against 12 upon the said stem, and

a suitable stop this spring tends to lower the valve to its seat. The oil-containing crank case of the engine is indicated by the numeral 13 and working in the same is a cam shaft 14 carrying the actuating cam 15 for the valve, the said cam being designed to coact with the push rod, which latter in turn, coacts with the lower end of the valve stem as will now be explained.

The push rod of the present invention in cludes a section 16 which is exteriorly cylindrical and which is formed in its lower portion with a smooth bore 17 and in its upper portion with a threaded bore 18 adjustably receiving an abutment screw 19 which is held at adjustment by means of a jam nut 20 threaded thereon and bearing against the .upper clearly shown in the drawings, the lower end of the valve stem 9, rests upon the head of the abutment screw 19 in both the open and closed positions of the valve. The section 16 of the push rod is slidably mounted in a suitable bearing 21 on the top of the crank case 13 and extends at its lower end into the crank case, where it is provided with a head 22 having a fiat under side, the head being concentric to the bore 17 of the said section. The lower sectionof the push rod includes a stem 23 which carries at its lower end an oil pocket 24. A cushioning disk 25 of fiber or leather, or any other suitable material, rests in the bottom of the oil pocket 24 beneath the head 22. The stem 23 is slidably fitted within the bore 17 in the lower portion of the upper section of the push rod and the head 22 is received within the pocket 24. A spring 26 is fitted within the upper end of the bore 17 and bears at its upper end against the inner end of the bore and at its lower end against the upper end of the stem 23. The tendency of the spring is of course to separate the sections of the push. rod and it therefore yieldably holds the head end of the abutment screw 19 against the lower end of the valve stem 9, and also holds the under side of the oil pocket 24 against the working face of the actuating cam 15.

The oil pocket is kept filled or substantially filled with oil contained within the crank case and by reference to Fig; 2 it will be observed that when. the valve 18 resting upon its seat and the under side of. the oil pocket is resting upon the inactive portion of the cam there will be a slight space between the under side of the head 22 and end of the section 16. As-

the upper face of the cushioning disk 25 ioning fluid, and an impact receiving mem- 1nto which oil may enter for the purpose of ber of yieldable material arranged within cushioning the contact of the said head and the said pocket.

disk as the active portion of the cam rides 2; In a device of the class described, the 25 beneath the oil pocket in lifting the valve combination with a valve and its stem, and from its seat. It will be apparent that While an actuating member for the valve, of a there is play between the sections of the push rod connection between the said stem push rod, the movement of the parts is and the said actuating'member including cushioned in a manner to obviate noise and relatively slidably connected sections, means 30 shock. It will also be apparent that the tending to separate the sections, an adjustvalve stem and the push rod may expand able abutment carried by one of the secand contract Without affecting the operations and engaging the said valve stem, an tion of the device and without in any way oil pocket carried by the other section, the interfering with the proper seating of the under side of the said oil pocket engaging 35 valve during the working stroke of the pisthe said actuating member, the first menton. tioned member being provided with ahead I claim: working in the oil pocket, and a cushioning 1. In a device of the class described, reladisk arranged withln the oil pocket and contively slidable sections, means tending to stituting an abutment for the said head. 40

separate the sections, a pocket carried by In testimony whereof I affix my signature. one of the sections for containing a cush- ARTHUR SUSS. 

